What are the causes of food allergies in children?

Consultant pediatric palace and fellow of Pediatrics premature, saying: divided food allergies in children into two types:

Sensitivity immune "disease", a result of a defect two bodies, caused by the lack of acceptance of the body for food items because of a defect in the ability to digest or digest one of the main components, because the cells of the atopic patient secrete antibodies to certain foods and when they meet these antibodies with those foods reaction occurs causing the secretion of certain chemicals, which cause the symptoms of allergies,
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 for example sensitivity of bovine milk, and the reason for this is that the children have a deficiency in the enzyme digester to milk protein an enzyme lactose, and this type of allergy is the most common and serious.
Sensitivity immune Leather in a mostly caused by this type:

First, the sudden lack of acceptance of the body for a certain type of food that may be addressed by the child constantly but suddenly caused him to allergies.

Second: Do not accept a body known for certain types of foods, especially when consumed in abundance such as bananas, and this type of viewer sensitivity and treatment is temporary and easy.

The symptoms of food allergies and clear where they appear as follows: vomiting, diarrhea, difficulty breathing, rash causes intense itching, redness of the skin with itching, swelling of the lips, tongue, or mouth with the itchy feeling, the rift and abdominal pain or a sore throat and nasal congestion, increased these symptoms with the continuity of eating food that causes it.
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Foods cause allergies are as follows: bovine milk, eggs, wheat, nuts and dairy products, soy milk, fish, crustaceans, marine, citrus, tomatoes, , strawberries, corn, and oats, and the role of the mother in the diagnosis should notice and monitor reactions to the child after eating food permanently and continuously.